Incandescent gas-burner.



N0. 708,222. Patented Sept, 2., |902,

T. GRDN. INCANDESGENT GAS BURNER. (Appucati'on med' .my 2e, 1901.) (NoModel.)

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UNITED STATES PATENT OFFICE.`

THOMAS GORDON, OF PHILADELPHIA, PENNSYLVANIA.

INCANDESCENT GAS-BURNER.

SPECIFICATION forming part of p Letters Patent No. 708,222, datedSeptember 2, 1902.

Application led July 26, 1901.

To all whom t may concern.'

Be it known that I, THOMAS GORDON, a citizen of the United States,residing at the city of Philadelphia, in the county of Philadelphia andState of Pennsylvania, have invented certain new and useful Improvementsin Incandescent Gas-Burners, of which the following is a speciication.

This invention relates to that class of gaslamps in which compressed airand gas are commingled preparatory to their passage to and combustion atthe burner-head. An objection heretofore to such lamps has been theannoying hissing sound caused by the ingress to the mixing-chamber ofthe air and gas through the inlet-orifices at the base of said chamber.To remedy this defect is the object of my invention, which, statedgene-rally, consists, first, in the provision between the air-supplypipe and the mixing-chamber of an elongated annular air-duct, and, sec-4ondly, in the provision between the gas-supply pipe and themixing-chamber of elongated ducts for the ingress of the gas to saidchamber.

The invention also comprises novel features of construction andarrangements of parts,

which will be hereinafter particularly described and claimed.

In the drawings, Figure lis a longitudinal section of an incandescentgas-burner ein-Y bodying my invention. Fig. 2 is a transverse section ason the line 2 2 of Fig. l. Y A represents the burner-head, B theinduction and mixing chamber below the same, and O D the gas and airsupply pipes, respectively, having communication with the interior ofthe said chamber. In the present instance the gas-supply pipe is screwedonto the lower end of a coupling member E, which is screwed upon anddepends from the body ofy the chamber B, and the air-supply pipe extendshorizontally through the wall of the member, so as to lie intermediatethe supplypipe and thebottorn of said chamber. This bottom comprises adiaphragm b, clamped in place by the member E. Rising centrally throughthe diaphragm is a tube d, the lower end of which opens into theair-supply pipe and the upper end communicates with the interior of thechamber B. Arranged axially within this tube is a stem or pin d',between serai No. 69,788'. (No model.)

which and the inner wall of the tube is formed an annular duct for thepassage of the air from the supply-pipe to the chamber B, this ductbeing of just sufiicient area to permit the ingress of a predeterminedvolume of air to the said chamber. When an ordinary tube of sufficientneness for the passage of a proper quantity of air is employed, adisagreeable hissing sound is occasioned by the passage of the airtherethrough; but when a larger tube with an annular air-d uct thereinis provided, as above described, the objectionable noise is eifectuallyobviated. To insure the axial position of the stem or pin within thetube during the passage of the air, and thus to provide for theuniformity of the annular duct, I set such stem or pin loosely withinthe tube and provide the former at its lower depending end with across-piece d2. The compressed air in its passage through the tubesupportsthe stem or pin and vmaintains it in the central position, thecrosspiece abutting against the lower end of the tube and serving as astop to limit the upward movement of the stem or needle.

Extending through the diaphragm are a series of elongated tubes c, whichaord com- `munication between the underlying gaschamber and the interiorof the chamber B. Bythe use of these tubesinstead of the usual orificesI have discovered that the hissing of the gas in its passage to themixing-chamber is also eifectually obviated. I may add that not onlyrdothe devices above described overcome the hissing heretofore caused bythe ingress of the air and gas to the induction and mixing chamber, buta more intimate and eficient commingling of the air and gas is had thanheretofore.

I claiml. In a gas-burner, the combination with an induction and mixingchamber, and a gassupply pipe having communication therewith, of anair-supply pipe, and means at the bottom of said chamber providing anelongated annular duct connecting the chamber with said air-supply pipe,the outlet or discharge portion of said duct being open andunobstructed.

2.'In a gas-burner, the combination with the induction and mixingchamber and the gas-supply pipe having communication there- IOO with, ofthe air-supply pipe, a tube leading therefrom to the said chamber, and acore n said tube, aording in the latter an annular duct having an openunobstructed outlet.

3. In a gas-burner, the combination with the induction and mixingchamber and the ga s-supply pipe having communication therewith, of theair-supply pipe, a tube leading therefrom to the said chamber, and alooselymounted stem or pin in said tube.

4. In a gas-burner, the combination With the induction and mixingchamber, and the air-supply pipe having central communication with saidchamber adjacent the bottom of the latter, of the gas-supply pipe, andthe elongated gas-ingress tubes disposed in the bottom of the saidchamber independently and laterally of the point of communicationbetween theair-supply pipe and said chamber.

5. In a gas-burner, the combination with .air-supply pipe to saidchamber, and an axially-disposed stem or pin in said air-duct.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS GORDON.

Witnesses:

ANDREW V. GROUPE, SADIE NOLAN.

